A combat-armor is a wearable apparel used to protect its wearer from impacts, such as bullets or bludgeoning force. A combat-armor generally is sold/distributed with an accompaining helmet as part of a complete kit, and thus the combat-armor refer to the combat-vest and combat-helmet, as well as any other itens that may come included in a kit, such as gauntlets or combat-boots.
The army issued PASGT vest (now outdated) is a form of combat armor consisting of the vest, boots, helmet (separately classified as simply the PASGT helmet). PASGT stands for Personal armor system for ground troops.